Abstract
The need for a practical, economic and environmentally sound solution for waste wood arises from the requirements for resource conservation and recent regulations. Co-firing with coal is a promising option for the thermal recycling of waste wood. The overall environmental impact caused by the co-utilisation of waste wood with coal was evaluated by using life cycle assessment as established by Society of Environmental Toxicology and Chemistry (SETAC) [A technical framework for life cycle assessment. Washington, DC: SETAC, USA; 1991, Guidelines for life cycle assessments: A code of practice. Brussels: SETAC, Europe; 1993]. This provides opportunities to evaluate direct environmental impact, to identify possible improvements, and to reduce energy resource consumption. In this work, the environmental impact of co-utilising lignite and waste wood in an industrial steam boiler was evaluated. Results obtained showed that co-utilisation is technically feasible and can meet strict environmental standards. A net decrease of CO 2 emissions can be achieved by the thermal use of waste wood, as well as conservation of fossil fuel resources, minimisation of waste disposal and reduction of impacts on health.
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